Types segmentation classifies Breast Milk Storage Bottles by material composition, a factor that directly influences cost structure, safety compliance, and end‑user preference. Plastic bottles, predominantly manufactured from BPA‑free polypropylene or high‑density polyethylene, dominate the market due to low unit cost, lightweight handling, and compatibility with standard freezer temperatures; they represent approximately 70 % of volume. Within this category, sub‑variants include wide‑neck designs that facilitate easy filling and pre‑sterilized units that reduce preparation time for caregivers; Glass containers, typically borosilicate, offer superior thermal stability and inertness, appealing to health‑conscious consumers and clinical protocols that demand traceability; they account for roughly 20 % of sales despite higher price points and fragility concerns. Silicone bottles, a newer entrant, combine flexibility with durability and can withstand repeated sterilization cycles, capturing an emerging niche of about 10 % driven by premium‑segment adoption. The proportional distribution of these material types underpins the overall market size, as manufacturers allocate R&D and production capacity in line with the relative revenue contribution of each type, a core element of Breast Milk Storage Bottles segmentation.